An ultra-high pressure multi-stage variable pressure relief valve

Abstract

The invention discloses an ultrahigh pressure multi-stage variable pressure relief valve. The ultrahigh pressure multi-stage variable pressure relief valve comprises a valve body; a horizontally arranged sealed cylindrical cavity is arranged inside the valve body; an oil inlet P and an oil outlet O which are communicated with the cylindrical cavity are formed in the lateral face of the valve body; a valve element is installed inside the cylindrical cavity; the left end of the valve element is fixedly connected with a transmission shaft; left-and-right movement of the transmission shaft is controlled by a displacement controller; the movement distance and movement speed of the transmission shaft driven by the displacement controller are controlled by changes of oil pressure difference between the oil inlet P and the oil outlet O through a programmable logic controller; control over the working states of high-pressure working, high-pressure oil drainage, low-pressure working and the like of high-pressure oil is achieved by arranging a closed section of the same diameter with the cylindrical cavity, a damping section of a plurality of annular grooves communicated in parallel, and a through section spaced with the inner wall of the cylindrical cavity on the valve element. The hydraulic damp of the pressure relief valve can be adjusted continuously and conveniently.

Description

technical field [0001] The invention belongs to the technical field of hydraulic valves, in particular to an ultra-high pressure relief valve. Background technique [0002] The synthesis equipment of synthetic diamond in my country is a six-sided top press, which uses an ultra-high pressure hydraulic system with an oil pressure of up to 100MPa. The ultra-high pressure oil pump it is equipped with can directly output oil pressure up to 100MPa to the working cylinder of the six-sided top press, and it needs to be released from the ultra-high pressure pipeline to reduce the pressure after the pressing work of the press is completed. At present, the ultra-high pressure pressure relief system of the six-sided top press basically uses the electromagnetic reversing valve to control the on-off of the single-stage pressure relief valve to achieve pressure relief. The small liquid flow damping hole is used to control the return flow rate of the drained oil to reduce the impact of pre...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to solve the problem that the flow of the super pressure relief valve is unstable during the process of super high pressure relief, resulting in impact and making the fluctuation of pressure relief and the deviation of the pressure relief curve relatively large, and proposes a super high pressure multiple Step variable pressure relief valve, the technical solution adopted to solve the above problems is:

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